Lighting Retrofits

1. Lighting Retrofits Sustainability Best Practices for Lighting Retrofits Cal Poly State University, San Luis Obispo Presented to the UC/CSU/CCC Sustainability Conference June 23, 2009 Presented by Dennis K. Elliot, PE, CEM Sustainability Manager

2. Lighting Retrofits Cal Poly San Luis Obispo Founded 1901 Wide variety of lighting systems Major retrofit in 2001 to T8 and electronic ballasts Underwent campus wide energy audit in 2007 – 2008 Identified numerous opportunities for lighting retrofit and redesign Worked with PIER and CLTC to implement 9 interior and exterior lighting technology demonstration projects for the 2008 Sustainability Conference, as well as educate our ESCO

3. Lighting Retrofits Smart Bi-Level Stairwell Fixtures Stairwells must be lit 24/7 for safety and egress Stairwell occupancy is intermittent and cyclical – may be empty 95% of the day Occu-Smart fixtures installed in 6 towers of Sierra Madre Hall, and Faculty Offices East System integrates ultrasonic motion sensors and dimmable ballasts into stairwell fixtures Dims to 20% output when not occupied, ramps up to full output if motion is detected – enhances security Reduced energy consumption by 90%

4. IOLS – Integrated Office Lighting System Lighting Retrofits Design approach – reduce overhead lighting, and utilize high efficiency task lighting Implemented in 10 private offices and 2 open work areas Before: Parabolic troffers with 2, 3, or 4 32W T8 lamps, 3500K “Glare bombs” – poor light distribution, glare on computer screens, users resorted to delamping to reduce glare Average energy use – 110W per fixture

5. IOLS – Integrated Office Lighting System Lighting Retrofits After: Lithonia RT5R troffer retrofit kits 2 lamps per fixture – 28W T5, 4100K Step dimming ballasts – most used at 50% output – 34W per fixture – 70% reduction “Volumetric” fixture with direct/indirect lens and reflector provides much improved distribution and uniformity, reduced glare Higher color temperature resulted in higher perceived light levels Lithonia RT8 now available, and has become the campus standard

6. IOLS – Integrated Office Lighting System Lighting Retrofits Task Lighting: Finelite PLS – Personal Lighting System System of LED desk lamps and undercabinet lamps 6, 9, or 12W Easily customized – single power supply per office Remote mount PIR motion sensor mounts under desk surface Very popular with users – some don’t use overhead lighting at all Total office lighting energy use reduced by 80%

7. ICLS – Integrated Classroom Lighting System Lighting Retrofits Pendant mounted fixtures with separately switched uplight and downlight to provide direct/indirect light – T8 lamps Separate circuit for projector screen or whiteboard fixtures Dual technology motion sensors – PIR and ultrasonic Modes: general instruction mode, A/V mode, 1 hour quite time override (prevents motion sensors from turning lights off), optional dimming capability Teacher control panel at front of classroom

8. ICLS – Integrated Classroom Lighting System Lighting Retrofits Two ICLS systems installed Science E27 auditorium lecture hall Used direct/indirect fixture with whiteboard fixture and A/V mode Lighting energy reduced by 50% Facility Services conference room Unusual application – 8 ft ceiling -used short pendants Uplight only, with dimmable ballasts Replaced 16 32W T8 lamps and 6 incandescent floods with 10 32W T8 lamps Improved light distribution and uniformity Lighting energy reduced by 30%

9. Hybrid Bathroom LED Light Switch Lighting Retrofits Many hotel/dorm users leave a bathroom light on at night Hybrid LED switch integrates a PIR motion sensor and 2 watt LED night light Users can use the bathroom at night without turning overhead lights on Occ sensors ensures lights cannot be left on Installed in 50 bathrooms in Cerro Vista Apartments Reduced energy use by 50%

10. Smart Bi-Level LED Bollards Lighting Retrofits Replaced 50W HPS walkway and area lights with 41W LED bollards Diffuser designed to take advantage of directional nature of LED source Use microwave motion sensing technology Dim to 8W when no motion is detected Long lamp life – up to 100,000 hours Used 180 degree pattern for walkway lights near building windows Reduced energy use by 70%

11. Smart Bi-Level LED and HID Streetlights Lighting Retrofits Cerro Vista - 100W HPS shoebox lights replaced with: 80W bi-level LED – dim down to 35% when no motion is detected 150W HID – dim down to 50% when no motion is detected Both produced higher quality light and color rendition Reduced energy consumption by 40%

12. Smart Bi-Level Induction Streetlights Lighting Retrofits Parking Lot H4 Replaced 250W HPS with bi-level 100W induction lamps PIR motion sensor on pole provides 270 degree coverage Dim to 50% when no motion is detected Much improved light quality and color rendition 100,000 hr lamp life Motion sensors provide enhanced security Reduced energy use by 74%

13. Lessons Learned Lighting Retrofits Scotopic vs Photopic light – color rendition can be more important than measured light level Raise your color temperature, but don’t mix Be careful in application of LED’s – exposed sources are extremely bright and can be harsh LED’s claim very long lamp life, but it is the driver that fails first – design of heat sink is critical Smart bi-level technologies don’t gain full benefit in high traffic areas Outreach and education is critical before you change users environment HPS 300 watts 21000 lumens CRI 22 LED 141 watts 8400 lumens CRI 75

14. Contacts and References Lighting Retrofits Dennis Elliot, Sustainability Manager, Cal Poly SLO, delliot@calpoly.edu PIER Program – http://www.energy.ca.gov/research/index.html CLTC – www.cltc.ucdavis.edu Smart Bi-Level Stairwell fixtures - www.occu-smart.com ICLS/PLS – www.finelite.com LED Bollards – www.sitelighting.com Hybrid LED Wall Switch – www.wattstopper.com Bi-level induction streetlights - www.fullspectrumsolutions.com BI-level LED Streetlights – www.betaled.com PIER Demo Sites via Google Earth - http://www.terradex.com/PublicPages/CIEE/pier-01.kmz